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    <title>Document</title>
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    <!-- <h1>Simple CSS Waves</h1> -->
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    <h1>第七章</h1>
    <h2><a href="/db/7/3.html">课三</a></h2>
    <h2><a href="/db/7/4.html">课四</a></h2>
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    <svg class="waves" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
    viewBox="0 24 150 28" preserveAspectRatio="none" shape-rendering="auto">
    <defs>
    <path id="gentle-wave" d="M-160 44c30 0 58-18 88-18s 58 18 88 18 58-18 88-18 58 18 88 18 v44h-352z" />
    </defs>
    <g class="parallax">
    <use xlink:href="#gentle-wave" x="48" y="0" fill="rgba(255,255,255,0.7" />
    <use xlink:href="#gentle-wave" x="48" y="3" fill="rgba(255,255,255,0.5)" />
    <use xlink:href="#gentle-wave" x="48" y="5" fill="rgba(255,255,255,0.3)" />
    <use xlink:href="#gentle-wave" x="48" y="7" fill="#fff" />
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      <p style="color: blue;"> 2023 | <a href="/db/res/404" style="color: blue;">Zarttic</a> </p>
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